This video is a Power Integrations course about fixing a flyback supply where the output fails to reach regulation. This course describes the steps to troubleshooting and repairing a power supply does not start up or reach regulation, even with no load applied. The possible causes for not reaching regulation are discussed, tests are conducted to isolate the source of the problem, and recommended solutions are provided. Take this course if your output does not reach regulation or is unstable, even with no loading on the output.
Source: EEweb Articles
Link: Fixing a Flyback Supply Where the Output Fails to Reach Regulation